The Urban Dictionary T-Shirt

Hand-candy is simply another word for a penis. The defining feature here being the masturbation or hand job motion that involves a grabbing action with a hand, as one would a pile of candy. Candy is also something that one might later put in their mouth, and represents the penis as a treat.

<Brill> Oh my gosh, look at those women! Boy howdy, they are corkers!
<Jazz> Oh god DAMN, you are right! Such fine hinders, and look at them gams! And the hand candy on the one in the blue is driving me krazy!!